Yellowcard's ability to switch between pensive, sparkling emo and anthemic pop-punk helped them burst out of California in the early '00s. Their sound runs from introspective and soft to charging, aggressive guitar assaults. The group quiet down on the violin-swept shimmer of acoustic rocker “Hang You Up”, while the brawny, overdriven riffs and unrelenting drums of “Lights and Sounds” show their heavier side. Ryan Key's intense vocals take tracks like the nostalgic heartbreaker “Ocean Avenue” to soaring heights.